OTTO CYCLE
GASOLINE ENGINE; OTTO CYCLE, McGraw- Hill Book Co, Made by Audio Productions, 8 min., sd., bkw, 16mm, (College physics series) Produced with the cooperation of the Visual Aids Committee of the American Association of Physics Teachers
Registration MP3906 No renewal found
- Term began
- 1952-12-30
- Claimant
- McGraw-Hill Book Co., inc
- Class
- MP — published motion picture other than a photoplay (numbering series begun Jan. 1950)
- Finding
- no renewal entry found for 1979-1981 or in the Copyright Office renewal records 1978-2025
- In the public domain since
- 1 January 1981 (end of the 28th year, no renewal)
A renewal would have appeared in the Copyright Office's renewal registrations 27 to 29 years after the term began. Those volumes are loaded and no matching renewal was found. A work published 1931–1963 that was not renewed entered the public domain at the end of its 28th year.
A renewal had to be filed in the 28th year and would be listed in the 1979 or 1980 volume; volumes searched: 1979, 1980, 1981.
Catalog entry
Catalog of Copyright Entries, Third Series, Parts 12–13: Motion Pictures, 1953, Internet Archive catalogofcopyrig371213lib (OCR text), lines 39129–39138.
GASOLINE ENGINE; OTTO CYCLE, McGraw- Hill Book Co, Made by Audio Productions, 8 min., sd., bkw, 16mm, (College physics series) Produced with the cooperation of the Visual Aids Committee of the American Association of Physics Teachers, © McGraw-Hill Book Co., inc.; 30Dec52 (in notice; 1951); MP3906.
Copies on the Internet Archive
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